TY  - RPRT
TI  - Preliminary geologic and structural maps and sections of the Marshall Pass Mining District, Saguache, Gunnison, and Chaffee counties, Colorado
AU  - J. C. Olson
PY  - 1979
DO  - 10.3133/ofr791473
UR  - https://pubs.usgs.gov/publication/ofr791473
ID  - ofr791473
ER  -